.header{
    width: 50%;
}

.red-board{
    margin-top: 0px;
    background-color: red;
    color: red;
}

.section{
    position: fixed;/*定位*/
    height: 90px;
    width: 100%;
    left:0;
    top:0;
    margin-top: 150px;
}

footer{
    margin-top: -5px;
    height: 300px;
}

#left1, #left2{
    float:left;
    width: 65%;
}

#right1,#right2{
    float: right;
    width: 32%;
}

p,span {
    font-size: 4px;
}